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Sagot :
[tex]8(4x-5)-12=20x-10\\
32x-40-12=20x-10\\
12x=42\\
x=\frac{42}{12}=\frac{7}{2}[/tex]
[tex]8(4x - 5)-12=20x-10[/tex]
[tex]32x - 40-12=20x-10[/tex]
[tex]32x -52=20x-10[/tex]
[tex]32x -52 -20x=-10[/tex]
[tex]12x -52=-10[/tex]
[tex]12x =-10 +52[/tex]
[tex]12x =42[/tex]
[tex]x= \frac{42}{12} [/tex]
[tex]x = \frac{7}{2} [/tex]
[tex]x=3 \frac{1}{2} [/tex] ≈ 3.5
[tex]32x - 40-12=20x-10[/tex]
[tex]32x -52=20x-10[/tex]
[tex]32x -52 -20x=-10[/tex]
[tex]12x -52=-10[/tex]
[tex]12x =-10 +52[/tex]
[tex]12x =42[/tex]
[tex]x= \frac{42}{12} [/tex]
[tex]x = \frac{7}{2} [/tex]
[tex]x=3 \frac{1}{2} [/tex] ≈ 3.5
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